#pragma once

#include<iostream>
#include<string>
#include<atomic>
#include<vector>
#include<sys/stat.h>
#include<sys/types.h>
#include<unistd.h>
#include<fstream>
#include<sys/time.h>
#include<boost/algorithm/string.hpp>
namespace ns_util
{
    const std::string temp_path = "./temp/";

    class TimeUtil{
        public:
        static std::string GetTimeStamp()
        {
             struct timeval _time;
             gettimeofday(&_time,nullptr);
             return std::to_string(_time.tv_sec*1000+_time.tv_usec/1000);
        }

        static std::string GetTimeMs()
        {
            struct timeval _time;
            gettimeofday(&_time,nullptr);
            return std::to_string(_time.tv_sec*1000+_time.tv_usec/1000);
        }
    };

    class PathUtil
    {
    public:
        static std::string AddSuffix(const std::string &file_name, const std::string &suffix)
        {
            std::string path_name = temp_path;
            path_name += file_name;
            path_name += suffix;
            return path_name;
        }

        //运行时需要的临时文件
        //构建源文件路径+后醉的完整文件名
        static std::string Src(const std::string &file_name)
        {
            return AddSuffix(file_name,".cpp");
        }
        //构建可执行文件程序的完整路径+后缀名
        static std::string Exe(const std::string &file_name)
        {
            return AddSuffix(file_name,".exe");
        }
        static std::string CompilerError(const std::string &file_name)
        {
            return AddSuffix(file_name, ".compile_error");
        }
        //运行时需要的临时文件
        static std::string Stdin(const std::string &file_name)
        {
            return AddSuffix(file_name, ".stdin");
        }
        static std::string Stdout(const std::string &file_name)
        {
            return AddSuffix(file_name,".stdout");
        }
        static std::string Stderr(const std::string &file_name)
        {
            return AddSuffix(file_name,".stderr");
        }
        //构建该程序对应的标准错误
    };

    class FileUtil
    {
        public:
        static bool IsFileExists(const std::string &path_name)
        {
            struct stat st;
            if(stat(path_name.c_str(),&st)==0)
            {
                //获取文件属性成功，说明文件已存在
                return true;
            }
            return false;
        }
        static std::string UniqFileName()
        {
            static std::atomic_uint id(0);
            id++;
            //毫秒级时间戳+原子性
            std::string ms=TimeUtil::GetTimeMs();
            std::string uniq_id = std::to_string(id);
            return ms+"_"+uniq_id;
        }
        static bool WriteFile(const std::string &target,const std::string &content)
        {
            std::ofstream out(target);
            if(!out.is_open())
            {
                return false;
            }
            out.write(content.c_str(),content.size());
            out.close();
            return true;
        }
        static bool ReadFile(const std::string& target,std::string* content,bool keep=false)
        {
            std::ifstream in(target);
            if(!in.is_open())
            {
                return false;
            }
            //getline不保存分隔符
            //getline内部重载了强制类型转化 
            std::string line;
            while(std::getline(in,line))
            {
                (*content)+=line;
                (*content)+=(keep?"\n":"");//是否保存分割符
            }
            in.close();
            return true;
        }
    };
 
    class StringUtil
    {
        public:
        static void SplitString(const std::string &str, std::vector<std::string> *target, const std::string &sep)
        {
            boost::split(*target,str,boost::is_any_of(sep),boost::token_compress_on);
        }
    };
}